The feature I’ve heard the Bluesky devs talk a lot about is aggregating likes across multiple servers. And search. As far as I can tell, they want Bluesky to be

The feature I’ve heard the Bluesky devs talk a lot about is aggregating likes across multiple servers. And search. As far as I can tell, they want Bluesky to be as fast and scalable as Twitter while being decentralised. If a celebrity with millions of followers uses Bluesky, all users across all servers should be able to follow them and like their tweets.